Ship s capstan



UNITED STATES Parana* ortica.

SAML. GATY, OF ST. LOUIS, MISSOURI.

SHIPS CAPSTAN.

To all whom t may concern Be it known that I, SAMUEL GATY, of St. Louis,in the State of Missouri, have invented a new and Improved Capstan; andI do hereby declare that the following is a full, clear, and eXactdescription of the same, reference being had to the annexed drawings,making a part of this specification, in which- Figure l, is a verticalsection of my improvement, Fig. 2, showing the plane of section. Fig. 2,is a plan or top view of ditto, the cap being removed.

Similar letters of reference indicate corresponding` parts in the twofigures.

The nature of my invention consists in attaching or connecting the bodyof the capstan to the head in two different ways, one being a directconnection, andthe other an indirect connect-ion by means of gearing arranged as will be presently shown, so that when the head is turned inone direction the body will turn wit-h it with equal speed, and when thehead is turned in the opposite direction the speed of the body will beconsiderably slower than that of the head.

To enable others skilled in the art to fully understand and construct myinvention, I will proceed to describe-it.

A, represents a platform or deck of a vessel on which a circularmetallic plate B, is secured, said plate having ledges or uprightprojections (a) (a) around its edge between which projections teeth (b)are placed at suitable and equal distances apart.

Tit-.hin the inner or smaller ledge or projection (a.) there is placed acircular frame (b) having friction rollers (c) placed within it. Thefra'me (b) is placed loosely on the plate B, and is allowed to turnfreely thereon.

C, represents the body of the capstan, which may be constructed of castiron. The lower end of the body C, is of flaring or bell shape and restsupon the friction rollers (c) in the frame (6') the body being hollow.To the upper end of the body C, there is attached a ratchet D, and tothe lower end .of the body on its inner side there are attached fourpawls (d) two of which are seen in Fig. l, and all are shown by dottedlines in Fig. 2.

E, represents a vertical shaft which passes through the center of thebody C, and also through the platform or deck A. The lower j end of theshaft is stepped in a boX (e) on |the bottom of a metallic Vtframing F,at-

tached to the under side of the platform or deck A. To the upper end ofthe shaft E, there is attached a ratchet wheel G, andy underneath theratchet G, between it and the upper end of the body C, there is placed ahead H, said head being loose on the shaft E.

The teeth of the two ratchets D, G, are cut in reverse or oppositedirections, and to the upper and under surfaces of the head H, there areattached pawls (f) which catch into the teeth of the ratchets, two pawlscatching into each ratchet.

To the lower end of the shaft E, and below the platform or deck A, thereis attached a toothed wheel I, which gears into a wheel J, on a shaft K.The upper end of the shaft K, passes through the platform or deck A, andhas a pinion L, upon it, which pinion gears into teeth cut on the innerperiphery of a rim M, the hub of which rests upon the center portion ofthe plate B, and is allowed to turn freely thereon, the hub (g) beingdetached from the shaft E. The outer periphery of the rim M, has ratchetteeth upon it into or between which the pawls (el) on the inner side ofthe body C, catch.

To the lower end of the body C, there are attached pawls (71,) whichwork over the teeth (o) between the ledges or projections (a) (a) on theplate B. The upper part of the head is covered by a cap N, see Fig. l.

Operation: The usual levers are placed in the head H, and when said headis turned from left to right the pawls (f) on the under side of the headH, will catch into or between the teeth of the ratchet D, and the bodyC, will be turned with the head, the shaft E, remaining stationary inconsequence of the pawls on the upper surface of the head slipping overthe teeth of the ratchet G. But if the head is turned in the oppositedirection or from right to left, the pawls (f) on the lower surface ofthe head H, will slip over the teeth of the ratchet D, and the pawls (f)on the upper surface of the head will catch into or between the teeth ofthe ratchet Gr, and the shaft E, will be turned and the rim M, inconsequence the pawls (d) will catch between the ratchet teeth on theouter periphery of the rim M,

of the gearing I, J, L, will be turned, and

which will consequently turn the body C, in the same direction as it waspreviously turned but with much less speed.

By the above improvement it will be seen that the speed of the rotationof the body C, may be increased or diminished according to the directionin which the head H, is turned, and when light work is to be per# formedor a small anchor drawn up and little power required, speed is obtained,but when power is required, by turning the head in an opposite directionspeed is lost or sacrificed and power obtained. I am aware that capstanshave been previously constructed for effecting the saine purpose; butthey have been arranged in a complicated way, were liable to get out ofrepair and consequently are not in general use.

SAML. GATY.

Vitnesses:

WM. H. STONE, D. L. LATOURTTE.

